<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col :span="6">
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '' ]" v-for="(item1 ,i1) in scope.row.children" :key="item1.id">
              <el-col :span="5">
                <!-- 一级 -->
                <el-tag closable
                        @close="tagCloseClick(scope.row, item1.id)">{{item1.authName}} </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span="19">
                <el-row  :class="[i2 === 0 ? '' : 'bdtop']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <!-- 二级 -->
                    <el-tag type="warning"
                            closable
                            @close="tagCloseClick(scope.row, item2.id)"> {{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3 ,i3) in item2.children"
                           :key="item3.id" 
                           type="danger"
                           closable
                           @close="tagCloseClick(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>

            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template width="400px" slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRights(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <el-dialog
      title="分配权限"
      :visible.sync="setRightsdialogVisible"
      width="50%"
      @close="setDialogClosed">
      <el-tree :data="rightsList" 
               :props="rightsProps"
               show-checkbox
               node-key="id"
               default-expand-all
               :default-checked-keys="leafKeys"
               ref="treeRefs">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="comfirmSetRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRightsdialogVisible: false,
      rightsList: [],
      rightsProps:{
        children: 'children',
        label: 'authName'
      },
      leafKeys: [],
      roleId: ''
    }
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const {data: res} = await this.$http.get('roles');
      this.rolesList = res.data;
      console.log(this.rolesList);
    },
    async tagCloseClick(role,rightsId) {
      const comfirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err);
        if(comfirmResult !=='confirm') 
          return this.$message.info('你取消了删除');
          const {data: res} = 
          await this.$http.delete(`roles/${role.id}/rights/${rightsId}`)
          if(res.meta.status !== 200) {
            return this.$message.error('删除权限失败')
          }
          role.children = res.data;
    },
    async showSetRights(role) {
      this.roleId = role.id;
      const {data: res} = await this.$http.get('rights/tree')
      if(res.meta.status !== 200) {
        return this.$message.error('获取树形权限列表失败')
      }
      this.rightsList = res.data;
      this.getleafKeys(role,this.leafKeys)
      this.setRightsdialogVisible =true;
    },
    getleafKeys(node,arr) {
      // 通过递归得到所有的id
      if(!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getleafKeys(item,arr)
      })

    },
    setDialogClosed() {
      this.leafKeys = [];
    },
    async comfirmSetRights() {
      const keys = [
        ...this.$refs.treeRefs.getCheckedKeys(),
        ...this.$refs.treeRefs.getHalfCheckedKeys(),
      ]
      const keyStr = keys.join(',');
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`
      ,{rids:keyStr});
      if(res.meta.status !== 200) {
        return this.$message.error("获取权限失败")
      }
      this.$message.success("获取权限成功");
      this.getRolesList();
      this.setRightsdialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop{
  border-top: solid 1px #eee;
}
.bdbottom {
  border-bottom: solid 1px #eee;
}
.el-row {
  display: flex;
  align-items: center;
}
</style>